At Gateway Renellie, in the 10 spaces outside the parking garage, you'll find a special validation code program in place. While visiting this location, be sure to request your validation/promo code from participating merchants while frequenting their establishments.
To redeem the code, start the ParkMobile parking session in the usual manner. After obtaining the validation code, go back into the active parking session and tap the 'ENTER PROMOTION CODE' field (highlighted below). After the code has been entered, the discount will be applied once the parking session ends.